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New install for social alarm system PSU

Stewart Mason

Hi

I'm going to let the photo speak for it's self. The RCBO is powering a PSU with battery back up, which is powering a social housing alarm system. All the equipment is mounted in a steel cabinet on the outside wall of a bungalow. The supply is a TNCS.

All comments will be gratefully received.

Thanks

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    I can't make out the residual rating of the incomer RCD - if it were an S-type (100mA or 300mA) it might not be unreasonable (if still probably more expensive a setup than it need be for TN). A 30mA upstream of an SPD would be a bit silly though.

       - Andy.

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  • 0

    I can't make out the residual rating of the incomer RCD - if it were an S-type (100mA or 300mA) it might not be unreasonable (if still probably more expensive a setup than it need be for TN). A 30mA upstream of an SPD would be a bit silly though.

       - Andy.

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